You might want to use this site

Just type in 'Pringles' there and you'll find some alternatives.

Best would be a worker-owned co-op if that exists there.

Check out Treets as a replacement for M&Ms. They originally belonged to Mars but for a couple of years the German Katjes took over the brand. There's even a vegan version if you want to add that to your assortment.

Most European supermarkets white label food is made in Europe. It can be hard to find confirmation it isn't made by the same factory, but even if it is most of your money goes to the employees, suppliers and local business. Some ingredients have a very common source (i believe a lot of almonds and walnuts come from the us), so it could be best to avoid products with those ingredients. But peanuts and cacao don't come from us, and potato starch and sunflower oil are also more likely local-ish.

Do they sell Smarties where you are? The most similar thing to M&Ms I can think of, just slightly larger. Problem is that its European but Nestlé...

How about Crunchips or Lorenz as replacement for Pringles?

Both produced by the same company (The Lorenz Bahlsen Snack-World GmbH & Co. KG Germany) in Germany, so it's mostly pricing and design that deviates.

Aldi's stacking chips are great, especially their sour cream and onion.